Computing-scale.



1. HOPKINSON.

COMPUTING' SCALE.

APRLICATION HLED NOV. 18, I913.

Patented July 20, 1915.

8 SHEETS-SHEET l f I J. HOPKINSON.

COMPUTING SCALE.

APPLICATION men NOV. m. 1913.

Patented July 20, 1915.

8 SHEETS-SHEET 2.

Q 4 M ir ys ..l., HOPKINSON.

COMPUTING SCALE.

APPLIQATION FILED NOV-'18, I913.

8 SHEETS-SHEET 3.

WITNEQSSES INVENTOR k t/056,314 Hopi/M70 ATTORNEY Patented July 20, 1915..

J. HOPKINSON.

COMPUTING SCALE.

APPLICATION flLED Nov.1a. 1913;

5 m. 0 y VLn M E W m w J. HQPKINSON. COMPUTINGSCALE.

APPLIICATIDNJFILED NOV. 18, 1913.

Patented July 20,;1915L s sHEE'Ts-sHEEH.

WW f

J. HOPKINS ON.

comrurmc SCALE. I I r ABPLICKTION FILED NOV-18. 191 3. a L 1 146,795.- Patented July 20, 1915 .7 a suing-SHEET s.

mvam'on Hopi/11.50): av

Jade 2% I WITNESSES Anognevs A J. HOPKlNSON- COMPUTING SCALE. I Y AFPLICATION man NOV. 18,1913.

8 SHEETS-SHEET 1.

"HZ/5 V 92 ii o I xii! a2 INvENTbR' Jo 05 fiaph'miqg Patented July 20, 1915;

.l. HOPKINS'ON. :COMPUTING SCALE. APPLICATION man nov. 18. 1913.

Patented Ju1 -2d, 1915.

8 SHEETS-SHEET s.

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WITNESS-ES INVENTOR l/op/rlnson JOSEPH HOPKINSON, F DAYTON, OHIO, ASSIGNOR TO THE COMPUTING- SCALE i COMPANY, OF DAYTON, OHIO, A CORPORATTON OF- OHIO.

COMPUTIN G-SGALE.

Specification of Letters Patent.

Patented July 20, 1915.

T all whom it may concern Be it known that I, JOSEPH Horxmsoiv, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Computing Scales, of which the following is a specification.

My invention relates to the class of coinputing scales by which the total weight and price are indicated; in which the computing and indicating elements are actuated by the commodity supporting element or platform through suspended mechanism; and in which mechanism the greatest accuracy and reliability in actuating the movable computing .and indicating elements are attained.

Said computing and indicating elements are preferably elevated above the weighing platform,-and the intervening mechanism leading from said platform to said elements is mounted in the frame below said elements and above said platform at one side. Said intervening mechanisms comprise pendulums freely suspended from said frame and so connected to the platform as to effect the desired result in a most efficient manner.

Further objects and advantages of my improved computing scale will become apparent in the following specification, when taken with the accompanying drawings, in

which" 1 Figure 1 is a perspective view of my inn proved scale. just within the lefthand walls of the base and the'cylinder casing. Fig. 3 is a vertical section substantially along the line 3, 8 of Fig. 2 showing the pendulum mechanism on a larger scale. Fig. 4 is an enlarged detail partly in section of a hub portion of one of the pendulums. Fig. 5 is a vertical section thereof taken along the line 5, 5 of Fig. l.

Fig. 6 is a horizontal section thereof taken along the line (3, (5 of Fig. 4. Fig. 7 is a. detail of the pivotal connections of the lever support with the flexible tapes. Fig. 8 is a. plan view of the base of the machine. Fig. 9 is a vertical section partly in elevation of a modified form of my invention. Fig. 10 is a perspective view of the elevated check. Fig. 11 is a plan view of a detail of said check. Fig.12 is a vertical section thereof. Fig. 13 is an elevation partly in section of pendulum mechanism of said modified form. Fig. .1 1 is a detail showing the elevated check. Fig.

Fig. 2 is a vertical sectionis a horizontal section of said modified orm.

As will be seen upon viewing Fig. 1, my

improved scale comprises a platform 20, or commodity supporting element, having a position above the base of the machine and an indicating element 21 having an elevated position and operatively connected with the platform mechanism, by a rod 22. The indicating or computing element 21 is illustrated as a revolving cylinder in the present embodiment of my invention and is provided with a pinion 2-l, which meshes with and is driven by a rack 28 fixed to the upper end of the rod 22. In the upwardly extending portion of the frame I mount two pendulums 25, which are connected -with the plat form by means of flexible tapes. 26, preferably of metal, these tapes being secured at one end to the lever support beneath said platform and at the other end being adapted to roll upon curved elements forming substantially the hubs of said pendulums. The curved faces of the said hubs are illustrated at 27 as projecting inwardly and toward each other and on the sides of the pivot opposite to said pendulums. The pendulums are supported by flexible tapes 28 which are adapted to roll upon concentric or cylindrical portions 29 of said hubs. The upper ends of said last named tapes are secured to cross bars 28 fixed to the upright portion of the framework. The flexible tapes 26 are secured tothe hub portions or arms, 27 by screws 30 and the tapes 28 are secured to the hub portions 29 by similar devices 31. Rubber cushions 32 fixed to the main frame prevent oscillation of the pendulums beyond their normal positions.

The portion 27 of the hub is adjustably connected with the pendulums in an angular manner by set screws 33 and 34. This structure is more particularly set forth in Figs. 4, 5 and 6. The set screw 33 is threaded through the upper end of the pendulum above the pin 36 and the set screw 34 is threaded through saidpendulum below said pin. These set screws bear above and below upon the body portion of the arm 27 and obviously provide for varying angular relations of said part 27 and the pendulum. The pin 36 is fixed in the upper portion of the pendulum by suitable means, such as the set screw 36, and is pivotally fitted in the cheeks 37 of the arm 27. The part 27 is provided with laterally extending trunnions 27 upon which are concentrically fixed the rings 29. Around these rings the supporting' tapes 28 are adapted to roll.

The upper curved face 38 .of the arm 27 is given such a form as will cause said arm to cotiperate with the pendulums in all of their diff'erentpositions in causing the lever supports for the platform to impart move ments to the computing cylinder 21, which are at all times proportional to the loads upon said platform.

The lower ends of the tapes 26 are secured to a clip 39, which .in turn is attached to the upper end of-a hook 40, said hook-engaging the yoke 41 pivotally engaging the knife edge 42. Said knife edge is secured in the lever 43, which in turn is pivotally mounted by the knife edge bearing -4445 upon the base 46. A similar knife edge bearing 47 at the extremity of the short arm of said lever receives the pressure of the downwardly projecting post -18 of the platform element 49. Another lever 50 is provided for receiv ing the pressure of the other half of the platform element, said lever 50 being fulcrumed by means of the knife edge bearings 51 upon the base of the machine. Similar knife edge bearings 52 at the extremity of the short arm of 'said lever receive the down- .htz'ard pressure of the posts 53. Other knife edge bearings 55 at the extremity ofthe long arm of said lever 50 transfer the downward pressure to the link 56, which in turn transfersj; aid pressure through knife edge bearingsl 57 to the 'lever 43. An extension 60 of the lever 43 forms a forked structure to which is pivotally attached a .yoke 61 by meansof a pin 62. To the yoke 61 is securpd the rod 22 leading to the computing mechanism. A correcting weight 63 is adjustably mounted upon a rod 64 secured to said yoke 61. I r

In the modified form shown in Figs. 9 to 15, inclusive, a single flexible supporting tape is attached to both of the hub por l' tions 72 and 73 on the pendulums and has it's intermediate portion Jolled around an equalizing pulley 71 whic is secured to the lever support 76. The means of securing said upright arm 82, which is movably attached to the upper portion of the frame by what I term the elevated check 83. Said check 83 pivotally connected to the arm 82"by knife ings. Each end of this elevated check is; f

shown in Figs. 10, 11 and 12. 'The knife edge 86 bears against the. vertical plate 88 and a similar knife edge 87 bears against the vertical plate 89. The oppositely dis posed knife edge 90 on the piece 83 bears against the flat vertical portion of the pin 91 and the other end of the piece 83 bears against the vertical flat face of the pin 84.. By the use of this elevated check a single lever 76 becomes sufficient for supporting the platform and preventing oscillation out of a horizontal position.

In Figs. 13 and 15 the trunnions 100 of the pendulum hubs are provided with pins 101 which move vertically in slotted plates 102 secured to the frame of the machine. The said pins 101 work freely in said slotted plates without contact therewith and prevent vibration of the pendulum hubs.

In the use and operation of my improved scale it will be seen that when commodities are placed upon the platform 20, the weight thereof will cause a downward pressure tapes 26 roll upon the curved surface of the I hub parts 27 and it will be seen that as the movement continues said tapes will act upon portto nsof said parts which have smaller radii. In other words, as the movements /continue, due to the increasing loads, the parts 27 will present portions'of their surfaces to the pull of said tapes which have decreasing radii. Because. of said decrcasing radii the leverage exerted upon the pendulums will become less and still further arms of the-pendulums25 vin a mftnner to cause the different loads to produce proporhence of the computing mechanism.

The supporting tapes 28 roll upon the concentric portions 29 of the hubs at a constant radius and hence have no effect upon the operation of the parts just described. The tendency, of course, of the tapes 28- is to cause the pendulum to rotate in the same direction as the tapes 26, but the proportions of the parts 27 are such as to compensate for said tendency.

3,,f'or example) that the two flexible clolueuts 26 and 28 attached to the same hub 29, both wind in the same direction around tionate movements of the lever support and '..'increments of load are necessary to produce further movements of the pendulums.

The curved portions of the parts 27 have such a form that their variable radii to operate with the variable effective weight" .It will be observed (by reference to Fig.

the hub from their points of attachment thereto. In this way, both flexibleelements wind simultaneously on the hub or unwind simultaneously therefrom, and as the load 5 increases the hub is lowered though the pendulum is raised. a

While I have described my invention more or less precisely as regards details of construction, I do not wish to be limited thereto unduly for the'reasonthatI contemplate changes in the forni and the substitution of equivalent parts as circumstances suggest or render expedient without departing from the spirit of my invention. I claim:

1. In a-device of the class described, a commodity supporting element, a lever support for said element, a pendulum having a hub with two parts ofdiflerent curvature, a

zo'flexible supporting element attached to' and adapted to roll upon one part of said hub, and a second flexible element secured to said hub and to said lever support and adapted to roll upon the-other part of said hub, both said flexible elements winding around said 1 hubin the same direction from their respective points of attachment thereto.

2. In a device ofthe class described, a commodity supporting element, a lever support for said element a pendulum having a hub,a flexible supporting element attached to and adapted toroll upon said hub, and a secondflexible element secured to said hub and to said lever supportand adapted to 3.5 roll upon saidhub, a portion of said hub that receives said second flexible element having a curved form of variable radius cooperating with the variable effective weight arm of said pendulum, whereby different 4 loads .upon the commodity supporting element will cause, proportionate movements of said lever support, both said flexible elementswinding around said hub in the same direction from their respective points of attachment thereto.

3. In a device of the class described, a commodity supporting element, a lever suportifor said element, a pendulum having a Eub, a flexible supporting element attached o and adapted to roll upon said hub, a sec- [ond flexible element secured to said hub and 'to said lever support and adapted to roll ponsaid hub, a portion of said hub that 'eceives said second flexible element having a curved form of variable radius coopei 'ating with the variableeffective weight arm of said pendulumywhereby different loads I tupon the commodity supporting element will cause-proportionate movements of said leve1'.support,"and computing mechanism actuatedv by, saidlever support, both said flexible elements winding around said hub in p the same direction from their respective points otattachment thereto. P 4'. In a device of the class described, a

commodity supporting element, a lever support for said element, a pendulum havmg a hub, a flexible supporting element attached;

ating with the variable efl'ective weight arm of said pendulum, whereby different loads upon the commodity supporting element will cause proportionate movements of said lever support, computing mechanism actuated by said lever support, and a frame having a portion elevated above said commodity supporting element for carrying said computing mechanism.

5. In a device of the class described, a commodity supporting element, a lever support for said element, a pendulum having a hub, a flexible supportingelement attached to and adapted to roll upon said hub, a second flexible element secured to said hub and to said lever support and adapted to roll upon said hub, a portion of said hub that receives said second flexible element havinga curved form of variable radius cooperating with the variable eflective weight arm of said pendulum, whereby difl'erent loads upon the commodity supporting element will cause proportionate movements of said le ver support, computing mechanism actuated by said lever support, a frame having a portion elevated above said commodity supporting element for carrying said computing mechanism, an elevated extension fixed to said commodity supporting element, and means for movably attaching said extension to the elevated portion of the -frame.

(3. In a device of the class described, a'

commodity supporting element, a lever support for said element, pendulums, hubs for said pendulums with parts of different curvature, flexible supporting elements attached to and adapted to roll upon parts of the hubs of said pendulums, and flexible supporting elements attached to said lever support and adapted to roll upon other parts of said hubs having different curvature, all said flexible elements that are attached to each hub winding around said hub inthe same direction from their respective points of attachment thereto. r

7. In a device of the class described, a commodity supporting element, a lever support for said element, pendulums, flexible supporting elements attached to and adapted to roll upon the hubs of said pendulums, a second flexible supporting element at tached 'to said pendulums, and a pulley attached to said lever support and with said second flexible supporting element passing ments attached to and adapted to roll upon.

certain parts of the hubs of said pendulums,

and'flexible supporting elements attached to said lever support and said hubs and adapted to-roll upon other parts of said hubs of different curvatiire, said-pendulums being symmetrically disposed with reference to the point of attachment of said last named supporting elementto said lever support, all said flexible elements that are attached to each hub winding around said hub in the same direction from their respective points or attachment thereto.

9. In a device of the class described, a

I commodity supporting element, a lever support for said element, two symmetrically formed pendulums, flexible supporting'elements attached to and adapted to roll upon the hubs of said pendulums, xible supporting elements attached to sai lever support andsaid hubs and adapted to roll upon said-hubs, said pendulums being symmetrically disposed with reference to the pointof attachment of said last named supporting element tosaid lever support, and a pulley at said pointof attachment by which the tension transmitted to said elements by said lever support is equally divided and impa rtcdto said elements and thence to said pendulums.

10. In a -device of the class described, a commodity supporting element, a lever support for said element, two symmetrically formed pendulums, flexible supporting elements attached to and adapted to roll upon certain parts of .the hubs of said pendulums, flexible sup mrtimg, elements attached to said leversupport and said hubs and adapted to roll upon other parts of said hubs of different curvature, all said flexible elements that are attached to each hub winding around said hub in the same direction from their respective points of attachment thereto, said pendulums being symmetrically disposed with reference to the point of attachment of said last named supporting elements to said lever support and a. frame having an elevated portion risingabove said commodity supp n-ting element and holding the free ends of said first named flexible supporting certain parts of the hubs of said pendulums I I flexible supporting elements attached to sai lever support and said hu and adapted to roll upon other parts 0 s ent curvature, all s flexible elements that aid hubs of differ-j are attached to each hub winding around said hub in the same direction from their respective points of attachment thereto, said pendulums being. symmetrically disposed" with reference to the point of attachment of said last named supporting elements to said lever support, a frame having an elevated portion rising above said commodity sup-' porting element and holding the free ends of said first named flexible supportin elements, computing mechanism mounted upon said elevated portion, and means operatlvely connecting said lever support and said computing mechanism. v

12. In a device of the class described, a

commodity supporting element, a lever sup port for said element, a pendulum having a hub adjustably attached thereto, said hub having an intermediate part of one curvature and adjacent parts on each side of another curvature, a flexible supporting element secured to said hub and to said lever support and adapted to roll upon the intermediate part of the hub, and flexible supporting elements attached to fixed points.

radius, and a second flexible su porting element secured to said hub and It aptedto roll upon said concentric portion.

14. In a device of the class described, a commodity supporting element, a lever support for said element, a pendulum having a hub, a flexible supporting element attached to and adapted to roll upon said hub, a second flexible element secured to said hub and to said lever support and adapted to roll upon saidj ub, a frame having an elevated extension to which said first namedeflexible element is attached, and a pin and slot guide for said hub.

15. In a device'of theclass described, a

commodity supporting element, a lever sup- Y port for said element, a pendulum having'a hub, a flexible supporting element attached to and adapted to roll upon a certain part cured to said hub and to said lever support flexible elements that are attached to each 126 of said hub, a second flexible'element sehub winding around said hub 1n the same direction from their respective points of attachment thereto, a frame having an elevated extension to which said first named flexible element is attached, computing mechanism mounted upon said extension, and means operatively connecting said computing mechanism and said lever support.

16. In a device of the. class described, a commodity supporting element, a lever support.for said element, a pendulum having a hub, a flexible supporting element attached to and adapted to roll upon said hub, and a second flexible element secured to said hub and to said l'ever support and adapted to roll'upon said hub, said hub being divided into twdrelatively adjustable parts, one of which is fixed to said pendulum, said flexible supporting element rolling upon one of said parts, and said second flexible element r0lling upon the other of said parts.

17. In a device of the class described, a commodity supporting element. a lever support for said element, a pendulum having a hubfa flexible supporting element attached to and adapted to roll upon said hub, and a second flexible element secured to said hub and to said lever support and adapted to roll upon said hub, said hub being divided into two relatively adjustable parts, one of which is fixed to said pendulum, said-flexible supporting element rolling upon one of said parts, and said second flexible element rolling upon the other of'said parts, the adjustment of said part-s'being in an angular relation about their common axis of rotation whereby the relation between the effective weight arm of said. pendulum and of the effective radius of one of said parts may be varied.

18. In a device of the class described, a commodity supporting element, a lever support for said element, a pendulum having a hub, a flexible supporting element attached to and adapted to roll upon said hub, and a second flexible element secured to said hub and te said lever support and adapted to roll upon said hub, and a pin and slot guide for guiding said hubs in a vertical direction.

19. In a device of the class described, a fixed supporting frame, two flexible tapes hanging therefrom, a pendulum with a hub having three curved surfaces side by side, the lower ends of said tapes being attached to the outer curved surfaces and adapted to wrap thereon, another flexible tape attachedto the intermediate curved surface, a commodity supporting element operatively attached to said last mentioned flexible tape, all said tapes winding around said hub in the same direction from their respective points of attachment thereto, and a rotatable indicator with a fixed axis operatively connected to said commodity-supporting element. Y

20. In a device of theclass described, a fixed supporting frame, a flexible tape hanging therefrom, a pendulum with a hub having two parts of different curvature, said flexible tape being attached to one said part, another flexible tape attached to the other said part, a commodity supporting element attached to said last mentioned flexible tape, both said tapes winding around said hub in the same direction from their respective points of attachment thereto, and a rotatable indicator with a fixed axis operatively connected to said commodity-supporting element.

In testimony whereof, I have subscribed 

